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Finding the Fourth Proportional to 426,946.68, 640,456.50 and 127,407.96

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Solution

The fourth proportional to 426,946.68, 640,456.50 and 127,407.96 is: 191,122.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,946.68 : 640,456.50 = 127,407.96 : x
  2. Step 2: Convert to fraction form
    426,946.68/640,456.50 = 127,407.96/x
  3. Step 3: Cross multiply
    426,946.68x = 640,456.50 × 127,407.96
  4. Step 4: Simplify right side
    426,946.68x = 81,599,256,133.74
  5. Step 5: Solve for x
    x = 81,599,256,133.74/426,946.68
  6. Step 6: Final answer
    x = 191,122.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.